Good graphic is always appriciable, as long as it doesn't require much of my system and won't cause frame rate to drop too much. How good should graphic be? I say just enough for player to make sense of what is what in the game.

Some shooting games used out-worldly graphic which require out-worldly system performance. You know, that's sucks. I won't buy it but I'll play it, some how.

If you're not familliar with PC games why don't start with small casual games like farm frenzy or something? Diablo II is good too, if you don't mind old graphics.

Starcraft II is good and probebly the best.

Shouldn't we wait for Chrismas before judging the best?

But before everyone forget about it, I say Amnesia is the best horror game.

For me, dying is about not change and being rotten and boring. PC games change, so, not dead.

Apart from what people already said, I think Sacred 1 + 2 is worth a try as point and click RPG.

For RTS, I think if you like a fast paced like Warhammer, you'd love World in Conflict which pretty old (and become cheap)but still kick.

I think D2 worth a collection. I still have it installed in my PC for multiplayer right now. It's 20 bucks something which fairlt cheap now.